                                                  &Number of Individuals         \\
\midrule
1                                                 &           2         \\
                                                  &                     \\
2                                                 &           9         \\
                                                  &                     \\
3                                                 &           5         \\
                                                  &                     \\
4                                                 &           3         \\
                                                  &                     \\
\midrule
Observations                                      &          19         \\
